1243353054240 has 768 divisors, whose sum is σ = 4960018022400. Its totient is φ = 288152985600.

The previous prime is 1243353054211. The next prime is 1243353054277. The reversal of 1243353054240 is 424503533421.

1243353054240 is a `hidden beast` number, since 1 + 2 + 4 + 33 + 530 + 54 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1243353054195 and 1243353054204.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 122263876 + ... + 122274044.

It is an arithmetic number, because the mean of its divisors is an integer number (6458356800).

Almost surely, 2^{1243353054240} is an apocalyptic number.

1243353054240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243353054240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2480009011200).

1243353054240 is an abundant number, since it is smaller than the sum of its proper divisors (3716664968160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243353054240 is a wasteful number, since it uses less digits than its factorization.

1243353054240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10318 (or 10304 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 1243353054240 its reverse (424503533421), we get a palindrome (1667856587661).

The spelling of 1243353054240 in words is "one trillion, two hundred forty-three billion, three hundred fifty-three million, fifty-four thousand, two hundred forty".